const { FixedClusterPool } = require('../../../lib/index')
const TestUtils = require('../../test-utils')
const numberOfWorkers = 10
-const maxTasks = 500
const pool = new FixedClusterPool(
numberOfWorkers,
'./tests/worker-files/cluster/testWorker.js',
)
const emptyPool = new FixedClusterPool(
1,
- './tests/worker-files/cluster/emptyWorker.js'
+ './tests/worker-files/cluster/emptyWorker.js',
+ { exitHandler: () => console.log('empty pool worker exited') }
)
const echoPool = new FixedClusterPool(
1,
errorHandler: e => console.error(e)
}
)
-
const asyncErrorPool = new FixedClusterPool(
1,
'./tests/worker-files/cluster/asyncErrorWorker.js',
{
- onlineHandler: () => console.log('worker is online')
+ errorHandler: e => console.error(e)
}
)
const asyncPool = new FixedClusterPool(
1,
- './tests/worker-files/cluster/asyncWorker.js',
- {
- maxTasks: maxTasks
- }
+ './tests/worker-files/cluster/asyncWorker.js'
)
-describe('Fixed cluster pool test suite ', () => {
+describe('Fixed cluster pool test suite', () => {
+ after('Destroy all pools', async () => {
+ // We need to clean up the resources after our test
+ await echoPool.destroy()
+ await asyncPool.destroy()
+ await errorPool.destroy()
+ await asyncErrorPool.destroy()
+ await emptyPool.destroy()
+ })
+
it('Choose worker round robin test', async () => {
const results = new Set()
for (let i = 0; i < numberOfWorkers; i++) {
expect(result).toBeFalsy()
})
+ it('Verify that busy event is emitted', async () => {
+ const promises = []
+ let poolBusy = 0
+ pool.emitter.on('busy', () => poolBusy++)
+ for (let i = 0; i < numberOfWorkers * 2; i++) {
+ promises.push(pool.execute({ test: 'test' }))
+ }
+ // The `busy` event is triggered when the number of submitted tasks at once reach the number of fixed pool workers.
+ // So in total numberOfWorkers + 1 times for a loop submitting up to numberOfWorkers * 2 tasks to the fixed pool.
+ expect(poolBusy).toBe(numberOfWorkers + 1)
+ })
+
it('Verify that is possible to have a worker that return undefined', async () => {
const result = await emptyPool.execute()
expect(result).toBeFalsy()
inError = e
}
expect(inError).toBeDefined()
- expect(typeof inError === 'string').toBeTruthy()
+ expect(typeof inError === 'string').toBe(true)
expect(inError).toBe('Error Message from ClusterWorker')
})
inError = e
}
expect(inError).toBeDefined()
- expect(typeof inError === 'string').toBeTruthy()
+ expect(typeof inError === 'string').toBe(true)
expect(inError).toBe('Error Message from ClusterWorker:async')
})
expect(usedTime).toBeGreaterThanOrEqual(2000)
})
- it('Verify that maxTasks is set properly', async () => {
- const worker = asyncPool.chooseWorker()
- expect(worker.getMaxListeners()).toBe(maxTasks)
- })
-
it('Shutdown test', async () => {
const exitPromise = TestUtils.waitExits(pool, numberOfWorkers)
await pool.destroy()
)
const res = await pool1.execute({ test: 'test' })
expect(res).toBeFalsy()
+ // We need to clean up the resources after our test
+ await pool1.destroy()
+ })
+
+ it('Verify that a pool with zero worker fails', async () => {
+ expect(
+ () =>
+ new FixedClusterPool(0, './tests/worker-files/cluster/testWorker.js')
+ ).toThrowError(new Error('Cannot instantiate a fixed pool with no worker'))
})
})